【单选题】已知全集U=R,A?U,B?U,如果命题P: 2 ∈A∪B ,则命题非P是( )
【判断题】It’s really good on the first date to do an activity in which you can have an opportunity to talk openly with one another.
【简答题】Ellen: They‘re showing Titanic on Channel 2. Jack: But we’ve already seen it, Ellen. Ellen: Yes, but I‘d like to see it again, Jack. Jack: When does it start? Ellen: It starts at half past eight and f...
【单选题】La página que le dará información de cómo aumentar en los pueblos la actividad cultural es...
A.
www.pueblosquebonitos.com
B.
www.progresorurales.com
【简答题】It’s often true that jobs for students sometimes lead to employment after graduation, so it’s a good idea to think carefully before you begin working during your college years. During my entire colleg...
【简答题】已知U=R,集合A{x|x<或x>2},则CUA= (A)(-2,2) (B)(-∞,-2)U(2,+∞) (C)[-2,2] (D)(-∞,-2]U[2,+∞)